Difference between the factorial of n and the double factorial of n.

A110903

Difference between the factorial of n and the double factorial of n.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =3a(4) =16a(5) =105a(6) =672a(7) =4935a(8) =39936a(9) =361935a(10) =3624960a(11) =39906405a(12) =478955520a(13) =6226885665a(14) =87177646080

External references